Big Snowy Formation
36 distinct taxa, from 43 fossil occurrences the Paleobiology Database records under this name, spanning 335–323 Mya.
Montana · US
36 taxa · 43 fossils · 335–323 MyaMacrostrat dates this rock 335–326 Ma. Macrostrat’s own record
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3 distinct localities, where the rock is now rather than where it was laid down. Tectonics draws the world it belonged to.
When
What has been found
- Eumetria
- Anthracospirifer
- Buxtonia
- Cavusgnathus
- Girtyella
- Ozarkodina
- Antiquatonia pernodosa
- Barytichisma
- Camarotoechia
- Chonetes
- Cleiothyridina hirsuta
- Cleiothyridina sublamellosa
- Composita
- Crinoidea
- Dictyoclostus inflatus
- Echinoconchus angustus
- Eolissochonetes pseudoliratus
- Fenestella
- Idioprioniodus
- Inflatia
- Linoproductus
- Michelinia
- Neospirifer
- Neospirifer praenuntius
- Ovatia
- Proetidae
- Punctospirifer
- Punctospirifer transversus
- Reticulariina
- Schuchertella
- Spirifer brazerianus
- Stenoscisma
- Torynifer
- Tubulipora
- Vogelgnathus campbelli
- Wilkingia inflata
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.